mirror of
https://sourceware.org/git/glibc.git
synced 2024-12-25 04:01:10 +00:00
83 lines
2.0 KiB
ArmAsm
83 lines
2.0 KiB
ArmAsm
|
/* ix87 specific frexp implementation for long double.
|
||
|
|
Copyright (C) 1997 Free Software Foundation, Inc.
|
||
|
|
This file is part of the GNU C Library.
|
||
|
|
Contributed by Ulrich Drepper <drepper@cygnus.com>, 1997.
|
||
|
|
|
||
|
|
The GNU C Library is free software; you can redistribute it and/or
|
||
|
|
modify it under the terms of the GNU Library General Public License as
|
||
|
|
published by the Free Software Foundation; either version 2 of the
|
||
|
|
License, or (at your option) any later version.
|
||
|
|
|
||
|
|
The GNU C Library is distributed in the hope that it will be useful,
|
||
|
|
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
|
|
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
||
|
|
Library General Public License for more details.
|
||
|
|
|
||
|
|
You should have received a copy of the GNU Library General Public
|
||
|
|
License along with the GNU C Library; see the file COPYING.LIB. If not,
|
||
|
|
write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
|
||
|
|
Boston, MA 02111-1307, USA. */
|
||
|
|
|
||
|
|
#include <machine/asm.h>
|
||
|
|
|
||
|
|
#ifdef __ELF__
|
||
|
|
.section .rodata
|
||
|
|
#else
|
||
|
|
.text
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.align ALIGNARG(4)
|
||
|
|
ASM_TYPE_DIRECTIVE(two64,@object)
|
||
|
|
two64: .byte 0, 0, 0, 0, 0, 0, 0xf0, 0x43
|
||
|
|
ASM_SIZE_DIRECTIVE(two64)
|
||
|
|
|
||
|
|
#ifdef PIC
|
||
|
|
#define MO(op) op##@GOTOFF(%edx)
|
||
|
|
#else
|
||
|
|
#define MO(op) op
|
||
|
|
#endif
|
||
|
|
|
||
|
|
.text
|
||
|
|
ENTRY(__frexpl)
|
||
|
|
movl 4(%esp), %ecx
|
||
|
|
movl 12(%esp), %eax
|
||
|
|
orl 8(%esp), %ecx
|
||
|
|
movl %eax, %edx
|
||
|
|
andl $0x7fff, %eax
|
||
|
|
orl %eax, %ecx
|
||
|
|
jz 1f
|
||
|
|
xorl %ecx, %ecx
|
||
|
|
cmpl $0x7fff, %eax
|
||
|
|
je 1f
|
||
|
|
|
||
|
|
cmpl $0, %eax
|
||
|
|
je 2f
|
||
|
|
|
||
|
|
fldt 4(%esp)
|
||
|
|
#ifdef PIC
|
||
|
|
call 3f
|
||
|
|
3: popl %edx
|
||
|
|
addl $_GLOBAL_OFFSET_TABLE_+[.-3b], %edx
|
||
|
|
#endif
|
||
|
|
fmull MO(two64) /* It's not necessary to use a 80bit factor */
|
||
|
|
movl $-64, %ecx
|
||
|
|
fstpt 4(%esp)
|
||
|
|
movl 12(%esp), %eax
|
||
|
|
movl %eax, %edx
|
||
|
|
andl $0x7fff, %eax
|
||
|
|
|
||
|
|
2: andl $0x8000, %edx
|
||
|
|
subl $16382, %eax
|
||
|
|
orl $0x3ffe, %edx
|
||
|
|
addl %eax, %ecx
|
||
|
|
movl %edx, 12(%esp)
|
||
|
|
|
||
|
|
/* Store %ecx in the variable pointed to by the second argument,
|
||
|
|
get the factor from the stack and return. */
|
||
|
|
1: movl 16(%esp), %eax
|
||
|
|
fldt 4(%esp)
|
||
|
|
movl %ecx, (%eax)
|
||
|
|
ret
|
||
|
|
END(__frexpl)
|
||
|
|
weak_alias (__frexpl, frexpl)
|